[SCSI] sd: change to auto suspend mode
Uses block layer runtime pm helper functions in
scsi_runtime_suspend/resume for devices that take advantage of it.
Remove scsi_autopm_* from sd open/release path and check_events path.
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c
index 8f6b12c..42539ee 100644
--- a/drivers/scsi/scsi_pm.c
+++ b/drivers/scsi/scsi_pm.c
@@ -144,33 +144,83 @@
#ifdef CONFIG_PM_RUNTIME
+static int sdev_blk_runtime_suspend(struct scsi_device *sdev,
+ int (*cb)(struct device *))
+{
+ int err;
+
+ err = blk_pre_runtime_suspend(sdev->request_queue);
+ if (err)
+ return err;
+ if (cb)
+ err = cb(&sdev->sdev_gendev);
+ blk_post_runtime_suspend(sdev->request_queue, err);
+
+ return err;
+}
+
+static int sdev_runtime_suspend(struct device *dev)
+{
+ const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
+ int (*cb)(struct device *) = pm ? pm->runtime_suspend : NULL;
+ struct scsi_device *sdev = to_scsi_device(dev);
+ int err;
+
+ if (sdev->request_queue->dev)
+ return sdev_blk_runtime_suspend(sdev, cb);
+
+ err = scsi_dev_type_suspend(dev, cb);
+ if (err == -EAGAIN)
+ pm_schedule_suspend(dev, jiffies_to_msecs(
+ round_jiffies_up_relative(HZ/10)));
+ return err;
+}
+
static int scsi_runtime_suspend(struct device *dev)
{
int err = 0;
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
dev_dbg(dev, "scsi_runtime_suspend\n");
- if (scsi_is_sdev_device(dev)) {
- err = scsi_dev_type_suspend(dev,
- pm ? pm->runtime_suspend : NULL);
- if (err == -EAGAIN)
- pm_schedule_suspend(dev, jiffies_to_msecs(
- round_jiffies_up_relative(HZ/10)));
- }
+ if (scsi_is_sdev_device(dev))
+ err = sdev_runtime_suspend(dev);
/* Insert hooks here for targets, hosts, and transport classes */
return err;
}
+static int sdev_blk_runtime_resume(struct scsi_device *sdev,
+ int (*cb)(struct device *))
+{
+ int err = 0;
+
+ blk_pre_runtime_resume(sdev->request_queue);
+ if (cb)
+ err = cb(&sdev->sdev_gendev);
+ blk_post_runtime_resume(sdev->request_queue, err);
+
+ return err;
+}
+
+static int sdev_runtime_resume(struct device *dev)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
+ int (*cb)(struct device *) = pm ? pm->runtime_resume : NULL;
+
+ if (sdev->request_queue->dev)
+ return sdev_blk_runtime_resume(sdev, cb);
+ else
+ return scsi_dev_type_resume(dev, cb);
+}
+
static int scsi_runtime_resume(struct device *dev)
{
int err = 0;
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
dev_dbg(dev, "scsi_runtime_resume\n");
if (scsi_is_sdev_device(dev))
- err = scsi_dev_type_resume(dev, pm ? pm->runtime_resume : NULL);
+ err = sdev_runtime_resume(dev);
/* Insert hooks here for targets, hosts, and transport classes */
@@ -185,10 +235,18 @@
/* Insert hooks here for targets, hosts, and transport classes */
- if (scsi_is_sdev_device(dev))
- err = pm_schedule_suspend(dev, 100);
- else
+ if (scsi_is_sdev_device(dev)) {
+ struct scsi_device *sdev = to_scsi_device(dev);
+
+ if (sdev->request_queue->dev) {
+ pm_runtime_mark_last_busy(dev);
+ err = pm_runtime_autosuspend(dev);
+ } else {
+ err = pm_runtime_suspend(dev);
+ }
+ } else {
err = pm_runtime_suspend(dev);
+ }
return err;
}